Corner-rounding woodworking-tool.



No. 68|,36O. Patanted Aug. 27, MIL

. B. WOOD.

CORNER BOUNDING WOOOWOBKING TOOL.

(Application filed June 1, 1901.)

(No Model.) 1

Q Bela WEZZflZ.

. MKUPWW UNITED STATES PATENT OFFICE.

BENJAMIN WOOD, OF KANSAS CITY, KANSAS, ASSIGNOR TO CHARLES F. BARTHOLOMEES, OF KANSAS CITY, MISSOURI.

CORNER- ROUNDING WOODWORKlNG-TOOL.

SPECIFICATION formingpart of Letters Patent No. 681,360, dated August 27, 1901.

Application filed June 1, 1901. Serial No. 62,744. (No model.)

To all whom it may concern.-

Be it known that I, BENJAMIN WOOD, a citizen of the United States, residing at Kansas City, in the county of Wyandotte and State of Kansas, have invented certain new and useful Improvements in Gorner-Roundin g Voodworking-Tools, of which the following is a specification.

My invention relates to woodworking-tools and my object isto produce a tool of this character whereby quarter-round corners may be produced on straight, convex, concave, or compound-curved surfaces around a circle, inside or out and with, against, or across the grain.

A further object is to produce a tool which cuts toward or from the operator and which is sharpened at one side while cutting with the other; furthermore, a tool which is an automatic guide in itself as regards its depthof cut without regard to whether handled by a skilled or unskilled operator.

With these general objects in view and with the further special object of producing a tool of simple, strong, durable, and cheap construction the invention consists in certain novel and peculiar features of construction and combinations of parts, as hereinafter described and claimed, and in order that it may be fully understood reference is to be had to the accompanying drawings, in which Figure l is a plan view of the face of the tool which is pressed against the object being worked. Fig. 2 is a central longitudinal section of the same and showing in proper relation thereto a strip of wood on which a quarter-round surface has been produced. Figs. 3 and 4 are cross-sections taken on lines III III and IV IV, respectively, of Fig. 1. Fig. 5 is a perspective view of the tool as constructed for producing quarter-round surfaces of only a single radius as provided with a handle.

Referring to the drawings in detail, where like reference numerals designate corresponding parts, 1 designates the body portion of the tool as embodying my preferred type of construction, the same being in the form of a segment of a cone and provided with a plurality of holes 2 of diameter diminishing toward the small end of the tool,.and I have found by experiment that the best results are attained when the diameter of each hole corresponds to the radius of the concave side of the body on a line taken transversely through the latter coincidently with that particular hole, and in order to illustrate this construction more clearly I have shown two cross-sections, which, if examined, will disclose the fact that the diameter of holes 2 corresponds with the radius of the inner side of the tool coincidently with the centers, from which the side at such points is struck. The convex side of the tool surrounding each hole is beveled outwardly, as at 3, from the inner or cutting edge of the latter at an angle of fortyfive degrees or more, as also shown clearly in said figures and in Fig. 2. In the manipulation of said tool it is held transversely of the corner to be removed from the object A, for instance, and should also be arranged at an angle of about forty-five degrees to such object, as shown in Fig. 2, so that when drawn toward or pushed from the operator it will remove the corner, as at a, leaving a quarter-round surface a, which corresponds in curvature to the hole, and in this connection it will also be observed that it is impossible for the tool to cut deeper than as indicated, as the side edges of the holesnamely,th0se edges in longitudinal alinement with the center of the tool-will bear against the fiat surfaces of the object and cause the tool to slide inoperatively thereon. Should the bevel 3 be exactly at an angle of forty-five degrees, as shown in Fig. 2, which.

is the preferred construction, said edges also by contact with the object prevent a deeper out being made; though without this bevel the tool cannot cut to a greater depth than as explained. It will also be noticed that should the width of the object be equal to twice the diameter of the hole contiguous corners can be successively removed and a half-round or semicircular surface be produced. The only limitation on the tool to produce quarter-round surfaces on an object is that the thickness of the latter must be at least equal to the diameter of the hole being used thereon, and by the hole it is to be v understood that the cutting edge of the hole is always referred to. It will thus be seen that in a single tool, as shown in Fig. 1, six difier- IOO ent quarter-round surfaces may be produced, and that the gradation and number of holes need be limited only by the size of the tool.

In Fig. 5 I show whatI term a single toolnamely, one provided with a single holethe body portion of which approximately corresponds in form to a section of the tool shown in Fig. 1, the principle of construction being precisely the same, as will be readily understood by imagining a handle attached to the tool shown in Fig. 1 and projecting at right angles to its longitudinal center. Said figure would then be precisely the same as Fig. 1, except that it would be provided with five extra holes. In Fig. 5 the stem which corresponds to the transversely-projecting portion referred to is numbered 4; and is provided with a wood handle 5 at its extreme end, adapted in form and size to be conveniently grasped by the operators hand. By continuing the body portion of the tool, as shown in Fig. 5, so as to approximate a circle, as shown in dotted lines 6, said tool may be conveniently provided with an additional hole, the principle of construction being precisely the same as that described.

In working with the tool the operator can conveniently slide it back and forth along the edge of theobject to be rounded, the advanced edge in either movement being, in effect, stropped or sharpened as the following edge performs its cutting function. It will thus be seen that in its manipulation the edge alternately cuts the object and is sharpened by the latter.

From the above description it will be apparent that I have produced a corner-rounding woodworking-tool which embodies the features of advantage enumerated as desirable in the statement of invention and which is obviously susceptible of changes in its form, proportion, detail, construction, and arrangement withou t departing from its spirit and scope. or sacrificing any of its advantages, and at this point it may be well to state that the principle of construction will be precisely the same if one edge only of the hole is made sharp, it being necessary, ,however, to have the bevel at the opposite edge also in order that the tool may operate to the best advantage. In this case, however, the tool will only cut when being manipulated in one direction.

Having thus described the invention, what I claim as new, and desire to secure by Letters Patent, is' 1. A corner-rounding woodworking-tool, comprising a metallic plate of curved form in at least one direction, and provided with a hole having oppositely-located cutting edges and beveled or flared on its convex side.

2. A corner-rounding woodworking-tool, comprising a' metallic plate of curved form, having an approximately circular hole and beveled or flared around said hole on its convex side.

3. A corner-rounding woodworking-tool, comprising a curved plate, provided with an approximately circular hole whose diameter is about equal to the radius of the inner side of the plate, said plate being beveled or flared outwardly from said hole on its convex side, substantially as described.

4. A corner-rounding woodworking-tool, comprising a metallic plate of curved form, and having a plurality of approximately circular holes, and beveled or flared outwardly from said holes on its convex side, substantially as described.

In testimony whereof I aflix my signature in the preseneeof two witnesses.

BENJAMIN WOOD.

Witnesses:

H. G. RODGERS, G. Y. THORPE. 

